Many big stars today were starting their careers from YouTube, but most of YouTubers are also doing their thing for the sake of their happiness while doing it. It gives them some types of accomplishment which release them from stress, even. And the second theory is how the story of Lee Chaerin made a YouTube channel.  Since she likes talking, doing make up & drawing so she made a tutorial, also singing by making covers, she made a channel for a place where she keeps her beautiful work